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SubjectRe: [PATCH v6 5/5] mfd: max77541: Add ADI MAX77541/MAX77540 PMIC Support
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On 3/28/23 07:35, Andy Shevchenko wrote:
> On Tue, Mar 28, 2023 at 04:18:30PM +0200, Nuno Sá wrote:
>> On Tue, 2023-03-28 at 14:46 +0100, Mark Brown wrote:
>>> On Tue, Mar 28, 2023 at 03:26:44PM +0200, Nuno Sá wrote:
>>>
>>>> IIRC, regmap_read() is not really reentrant and it is used in the
>>>> IIO
>>>> driver on the sysfs interface. So, yeah, I think you need the
>>>> regmap
>>>> lock and better just leave the config as is. Yes, the lock is opt-
>>>> out
>>>> so let's not disable it :)
>>> All the regmap operations are fully thread safe.
>> Even if 'config->disable_locking' is set? I think that is what's being
>> discussed in here...
> In case the driver has its own lock to serialize IO how on earth the regmap
> lock is needed.
But the driver does not have its own lock.

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